Wood-heel-turning machine



- Aprifi 9, 1929. N. w. KINNEY WOOD HEEL TURNING MACHINE Filed Aug. 17,1927 2 'mgln;

Patented Apr. 9, 1929.

entree eras NORTON W. KINNEY, OF HAVERHILL, MASSACHUSETTS, ASSIGNOR TOSLIPPER CITY WOOD HEEL COMPANY, OF HAVERHILL, MASSACHUSETTS, ACORPORATION OF MASSACHUSETTS.

WOOD-HEELTURNIN G MACHINE.

Application filed August 17, 1927. Serial No. 213,600.

This invention'relates to heel turning machines and is illustrated asembodied in a wood heel turning machine of the type disclosed in UnitedStates Letters Patent No.

1,580,184, issued April 18, 1926, on the application of John H. Vinton.

Machines of the type mentioned are provided with a jack for holding awood heel blank and swinging it past a rotary cutter.

The jack comprises a base plate on which the heel-seat portion of theblank rests, and a clamping member which may be swung into engagementwith thetoplift portion of the blank. The clamping-member is operated bya clamping lever which throws it toward the base plate, the clampinglever having an adjustable screw in its end by which it contacts withthe clamping member. The clamping lever is operated by a cam lever whichthrows it always to the same position, and adjustment of the screw isnecessary to enable the clamping lever to bring the clamping member intoproper contact with heel blanks of Varying sizes. When using gooduniform lumber, a single adjustment of the screw is sufficient for aconsiderable run of blanks.

It is the object of the present invention to provide an improved jackof'the type referred to by the use of which the handling of blanks madeof the cheaper-grades of lumber and lacking uniformity in thickness maybe facilitated. To this end I have provided what is in effect aresilient clamping lever, which, in the present embodiment of theinvention, is shown as a compound clamping lever having two resilientlyconnected portions so that any lack of uniformity in the thicknesses ofthe work pieces is absorbed in the resiiient connection, and the screwadjustment need be resorted to but seldom.

These and other features of the invention comprising certaincombinations and an rangements of parts will be apparent from thefollowing description of a preferred embodiment of he invention shown inthe drawings, in which Fig. 1 is a side elevation of the front part ofthe machine; and c Fig. 2 is a sectional detail of the resilientcompound clamping lever.

In the drawings only so much of a wood heel turning machine is shown asis necessary ing member 36.

for the understanding of the present invention, and reference may bemade to Letters Patent No. 1,580,184, above referred to, for furtherillustration and description of the construction and operation of partsnot fully disclosed herein.

mounted in the jack holder at 28 is the jack frame 30, having a baseplate 32 arranged to engage the heel-seat portion of a wood heel blank,a breast gage 34, and a toplift portion clamplng member 36. The member36 1s -mounted on a horizontally adjustable pivot 38 having theconsiderable range of adjustment necessary to enable its'endto overlapand engage properly with the toplift end of any type of heel blank 89.

A clamping lever 40 is pivotally mounted 8 at 42 on the jack frame 30.This lever 40 has a screw 44 mountedin its end, over the clamp- Vhen theheel blank is clamped the member 40 is forced to the position shown inFig. 1 by mechanism to be described, and gross variations in thethickness of the work are accommodated by adjustii'ient of the screw upand down in the end of the lever 40, so that any thickness of blank canbe clamped with the member 40 1n substantially the same position. Themember 86 is normally held up against the screw 44 by a 7 spring 45. Theupper surface of the member 36 is provided with a number of seats 48,each adapted to receive the screw 44, these seats consisting of holes ordrill spots, arranged along the length of the member 36, so that anylongitudinal adjustment of the member 36 will bring one of these seatsnearly under the screw 44. The screw 44 is threaded into a trunnionpiece 50, which is horizontally piv- 'oted in the end of the clampingmember 40,

thus permitting the screw to swing in the vertical plane of the member36, and to find the convenient seat as for any given condiion. A jam nut52 or any other convenient device can be used to preserve the adjustmentof the screw in the trunnioned nut 50.

Minor variations in height of the work pieces are compensated for by thepresent invention by providing a resilient clan'iping lever consistingof the member it) and a lever 56 terminally pivoted at 58 on the member40. A spring 541; is mounted in seats 55, one in the end of the member10 and the other in the middle part or the lever 56. A cam roll (30 ismounted at the other end oil the lever 56, engaging a. cam 62 on a camlever til pivoted at 66 on the jack frame 30.

The screw 4:4 will be adjusted so that the operation of the lever tojack a blank will appreciably con'ipress the spring 54:. Ehnallvariations in the work thickness will vary the compressioncorrespondingly, but leave the blank 39 under substantial clampingpressure, and the operator is thus relieved of the duty of frequentadjustment during a run of heels.

In the drawings the jack is shown in blankclamping position. To releasethe blank the operator will raise the handle 68 causing the cam 62 torun from under the roll 60. This will release the members 56, tocompletely so that they can swing around the pivot 12 releasing themember 36, when the blank can be removed and a new one inserted. Themembers 86, 410, the pivots 88, 4:2, 50 and the depression as constitutea linkage which changes its form as the member 86 is forced down on theheel blank 39. The pivot at 50 prevents any. tendency of the end of thescrew a l to scrape over the top of the member 36 as this change in formtakes place and avoids any danger of breaking or damaging the screw orthe member 36. The jack as a whole is tilted around the pivot 28 by theadjustable so-called upper track 70, as will be well understood by thosefamiliar with the art.

The organization of the adjusting screw 44 and the adjustable clampingmember 36 so that they co-operate sn'ioothly in all their relativeadjustments, as exemplified in the pivotal mounting for the screw andits seats in the member 36, embodies an invention of Walter W. Bradburydescribed and claimed in his application Serial No. 195,117, filed May28, 1927, and is not claimed herein.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a machine for turning wood heels, a

rotary cutter, a swinging jack arranged to hold and rotate a wood heelblank against the cutter, said jack comprising a clamping memberarranged to press against the heel blank, and means for operating theclamping member comprising a resilient lever and means for operating theresilient lever.

2. In a machine for turning wood heels, a

jack comprising a clamping member arranged to press against a heelblank, and means for operating the clamping member comprising aresilient lever and a cam lever for operating the resilient lever.

3. In a machine for turning Wood heels a jack comprising a support for aheel blank, compound lever arranged to "force the heel lank against thesupport, said lever being resiliently held in a normal position, andmeans or operating said lever arranged to distort it resiliently whilethrowing it toward the blank.

l. in a machine for turning wood heels, a jack comprising a support fora heel blank, a. clamping member arranged. to hold the heel blankagainst the support, and means for operating the clamping membercomprising a compound lever, a spring located between the arms of thecompound lever, and an operating means "for the compound lever, one armof the compound lever being arranged to engage the clamping member, andthe other arm being arranged to engage the operating means.

5. For use in a machine for turning wood heels, a jack comprising amember movable to engage one face of a heel blank, a clamping membermovable to hold the blank against the said member, and means foroperating the clamping member comprising a clamping lever pivoted on thejack frame, and arranged to engage the clamping member, a second leverpivoted on the clamping lever and having a resilient bearing against it,and a cam lever arranged to engage the second lever to operate theclamping lever.

6. In a machine for turning wood heels, a

'jack comprising a support for a heel blank,

a clamping member arr nged to clamp the blank against the support, andmeans for operating the clamping member comprising a clamping leverpivoted onthe ack frame, a second lever pivoted on the clamping lever,

a spring extending between the two said levers, and an operating leverarranged to engage the second lever.

7. In a machine for turning wood heels, a jack comprising a clampingmember arranged to contact with a heel blank, and means for operatingthe clamping member comprising a clamping lever pivoted near its middleon the jack frame with one of its ends engaging the clamping member, asecond lever pivoted adjacent the other end of the clamping lever, saidtwo levers having oppositely located seats, a spring located-in theseats, a bolt extending through the levers and the spring to hold thespring under tension, and an operating cam lever constructed andarranged to engage the second lever.

8. In a machine for making wood heels, a rotary cutter and a jack forholding and rotating a wood heel blank against the cutter, said jackcomprising a support for the wood heel blank, a resilient lever arrangedto force the blank toward the support and means for operating the lever,the lever being arranged to be resiliently distorted by the forceiinpressed on it by the operating means and the blank, whereby it cancooperate with blanks of varying thickness.

9. In a machine for making wood heels, a support for a heel blank, aresilient clamping lever arranged to force the heel blank toward thesupport, said lever having an adjustable part arranged between it andthe blank to avoid undue extremes in the operative position of theclamping lever, and means for operating the resilient lever to bring itinto operative position, the resiliency of the lever compensating forminor inequalities in the thickness of the work.

10. In a machine for making wood heels, a support for a heel blank, aresilient clamping lever arranged to force the heel blanktoward thesupport, said lever having an adjustable screw arranged between it andthe blank to avoid undue extremes in the operative position of theclamping lever, and means for operating the resilient lever to bring itinto operative position, the resiliency of the lever compensating forminor inequalities in the thickness of the Work.

In testimony whereof I have signed my name to this specification.

NORTON W. KINNEY.

